./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:28:49,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:28:49,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:28:49,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:28:49,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:28:49,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:28:49,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:28:49,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:28:49,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:28:49,628 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:28:49,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:28:49,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:28:49,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:28:49,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:28:49,628 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:28:49,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:28:49,629 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:28:49,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:28:49,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:28:49,630 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 [2025-02-07 20:28:49,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:28:49,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:28:49,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:28:49,849 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:28:49,849 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:28:49,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2025-02-07 20:28:51,042 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89d9c2046/dafe76e7d2b642bda02317edcb3748de/FLAG5cdd9a2e9 [2025-02-07 20:28:51,247 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:28:51,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2025-02-07 20:28:51,254 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89d9c2046/dafe76e7d2b642bda02317edcb3748de/FLAG5cdd9a2e9 [2025-02-07 20:28:51,605 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89d9c2046/dafe76e7d2b642bda02317edcb3748de [2025-02-07 20:28:51,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:28:51,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:28:51,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:28:51,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:28:51,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:28:51,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74781be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51, skipping insertion in model container [2025-02-07 20:28:51,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,620 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:28:51,714 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2025-02-07 20:28:51,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:28:51,737 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:28:51,744 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2025-02-07 20:28:51,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:28:51,773 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:28:51,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51 WrapperNode [2025-02-07 20:28:51,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:28:51,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:28:51,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:28:51,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:28:51,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,797 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2025-02-07 20:28:51,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:28:51,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:28:51,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:28:51,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:28:51,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,808 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,820 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:28:51,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,823 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:28:51,828 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:28:51,828 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:28:51,828 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:28:51,829 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (1/1) ... [2025-02-07 20:28:51,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:28:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:28:51,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:28:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:28:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:28:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:28:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:28:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:28:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:28:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:28:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:28:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:28:51,908 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:28:51,909 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:28:52,043 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 20:28:52,044 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:28:52,050 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:28:52,050 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:28:52,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:28:52 BoogieIcfgContainer [2025-02-07 20:28:52,051 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:28:52,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:28:52,052 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:28:52,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:28:52,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:28:51" (1/3) ... [2025-02-07 20:28:52,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bff43d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:28:52, skipping insertion in model container [2025-02-07 20:28:52,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:28:51" (2/3) ... [2025-02-07 20:28:52,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bff43d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:28:52, skipping insertion in model container [2025-02-07 20:28:52,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:28:52" (3/3) ... [2025-02-07 20:28:52,058 INFO L128 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2025-02-07 20:28:52,067 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:28:52,068 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dijkstra-u_valuebound20.c that has 3 procedures, 31 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 20:28:52,098 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:28:52,107 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@768ea644, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:28:52,109 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:28:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-07 20:28:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:28:52,116 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:28:52,116 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:28:52,116 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:28:52,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:28:52,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1528456584, now seen corresponding path program 1 times [2025-02-07 20:28:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:28:52,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532747893] [2025-02-07 20:28:52,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:28:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:28:52,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:28:52,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:28:52,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:28:52,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:28:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:28:52,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:28:52,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532747893] [2025-02-07 20:28:52,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532747893] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:28:52,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628308943] [2025-02-07 20:28:52,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:28:52,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:28:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:28:52,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:28:52,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:28:52,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:28:52,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:28:52,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:28:52,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:28:52,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 20:28:52,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:28:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:28:52,306 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:28:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628308943] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:28:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:28:52,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 20:28:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877676747] [2025-02-07 20:28:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:28:52,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:28:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:28:52,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:28:52,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:28:52,325 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:28:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:28:52,345 INFO L93 Difference]: Finished difference Result 60 states and 100 transitions. [2025-02-07 20:28:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:28:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-02-07 20:28:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:28:52,351 INFO L225 Difference]: With dead ends: 60 [2025-02-07 20:28:52,351 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 20:28:52,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:28:52,355 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:28:52,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:28:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 20:28:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-07 20:28:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:28:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2025-02-07 20:28:52,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 18 [2025-02-07 20:28:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:28:52,382 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2025-02-07 20:28:52,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:28:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2025-02-07 20:28:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:28:52,383 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:28:52,383 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:28:52,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 20:28:52,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-07 20:28:52,585 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:28:52,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:28:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1287900286, now seen corresponding path program 1 times [2025-02-07 20:28:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:28:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761523782] [2025-02-07 20:28:52,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:28:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:28:52,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:28:52,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:28:52,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:28:52,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:28:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:28:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:28:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761523782] [2025-02-07 20:28:52,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761523782] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:28:52,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:28:52,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 20:28:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927020686] [2025-02-07 20:28:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:28:52,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:28:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:28:52,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:28:52,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:28:52,915 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:28:56,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:01,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:29:01,670 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2025-02-07 20:29:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:29:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-02-07 20:29:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:29:01,672 INFO L225 Difference]: With dead ends: 60 [2025-02-07 20:29:01,672 INFO L226 Difference]: Without dead ends: 42 [2025-02-07 20:29:01,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:29:01,673 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2025-02-07 20:29:01,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2025-02-07 20:29:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-07 20:29:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-02-07 20:29:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-07 20:29:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2025-02-07 20:29:01,681 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2025-02-07 20:29:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:29:01,681 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2025-02-07 20:29:01,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:29:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2025-02-07 20:29:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 20:29:01,682 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:29:01,682 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:29:01,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 20:29:01,682 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:29:01,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:29:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -107141793, now seen corresponding path program 1 times [2025-02-07 20:29:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:29:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723806778] [2025-02-07 20:29:01,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:29:01,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:29:01,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:29:01,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:01,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:29:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:29:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:29:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723806778] [2025-02-07 20:29:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723806778] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:29:01,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70742341] [2025-02-07 20:29:01,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:01,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:29:01,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:29:01,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:29:01,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:29:01,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:29:01,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:29:01,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:01,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:29:01,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:29:01,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:29:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:29:02,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:29:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:29:02,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70742341] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:29:02,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:29:02,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-07 20:29:02,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412855371] [2025-02-07 20:29:02,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:29:02,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 20:29:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:29:02,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 20:29:02,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:29:02,297 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:29:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:29:03,015 INFO L93 Difference]: Finished difference Result 111 states and 177 transitions. [2025-02-07 20:29:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:29:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2025-02-07 20:29:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:29:03,017 INFO L225 Difference]: With dead ends: 111 [2025-02-07 20:29:03,017 INFO L226 Difference]: Without dead ends: 93 [2025-02-07 20:29:03,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:29:03,018 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:29:03,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 222 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 20:29:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-07 20:29:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2025-02-07 20:29:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2025-02-07 20:29:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2025-02-07 20:29:03,037 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 21 [2025-02-07 20:29:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:29:03,037 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2025-02-07 20:29:03,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:29:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2025-02-07 20:29:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 20:29:03,038 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:29:03,038 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:29:03,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:29:03,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:29:03,238 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:29:03,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:29:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 827956670, now seen corresponding path program 1 times [2025-02-07 20:29:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:29:03,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979226782] [2025-02-07 20:29:03,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:29:03,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:29:03,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:29:03,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:03,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:29:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383206737] [2025-02-07 20:29:03,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:03,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:29:03,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:29:03,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:29:03,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:29:03,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:29:03,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:29:03,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:03,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:29:03,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:29:03,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:29:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 20:29:03,390 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:29:03,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:29:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979226782] [2025-02-07 20:29:03,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:29:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383206737] [2025-02-07 20:29:03,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383206737] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:29:03,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:29:03,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:29:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687858158] [2025-02-07 20:29:03,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:29:03,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:29:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:29:03,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:29:03,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:29:03,391 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 20:29:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:29:03,517 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2025-02-07 20:29:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:29:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-02-07 20:29:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:29:03,518 INFO L225 Difference]: With dead ends: 86 [2025-02-07 20:29:03,518 INFO L226 Difference]: Without dead ends: 83 [2025-02-07 20:29:03,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:29:03,519 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:29:03,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:29:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-07 20:29:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-02-07 20:29:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2025-02-07 20:29:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2025-02-07 20:29:03,540 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 29 [2025-02-07 20:29:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:29:03,540 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2025-02-07 20:29:03,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 20:29:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2025-02-07 20:29:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:29:03,541 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:29:03,541 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:29:03,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 20:29:03,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:29:03,742 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:29:03,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:29:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 372367076, now seen corresponding path program 1 times [2025-02-07 20:29:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:29:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720136698] [2025-02-07 20:29:03,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:29:03,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:29:03,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:29:03,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:03,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:29:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237400393] [2025-02-07 20:29:03,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:29:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:29:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:29:03,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:29:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:29:03,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:29:03,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:29:03,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:29:03,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:29:03,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 20:29:03,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:29:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:29:03,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:29:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:29:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:29:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720136698] [2025-02-07 20:29:05,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:29:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237400393] [2025-02-07 20:29:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237400393] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:29:05,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:29:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2025-02-07 20:29:05,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073407749] [2025-02-07 20:29:05,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:29:05,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 20:29:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:29:05,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 20:29:05,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:29:05,757 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 20:29:12,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:16,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:21,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:26,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:31,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:35,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:39,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:44,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:48,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:52,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:29:56,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:00,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:04,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:08,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:10,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:30:10,782 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2025-02-07 20:30:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:30:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2025-02-07 20:30:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:30:10,784 INFO L225 Difference]: With dead ends: 152 [2025-02-07 20:30:10,788 INFO L226 Difference]: Without dead ends: 128 [2025-02-07 20:30:10,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:30:10,789 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 27 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 69 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.5s IncrementalHoareTripleChecker+Time [2025-02-07 20:30:10,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 315 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 201 Invalid, 13 Unknown, 0 Unchecked, 62.5s Time] [2025-02-07 20:30:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-07 20:30:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2025-02-07 20:30:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 60 states have internal predecessors, (68), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2025-02-07 20:30:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2025-02-07 20:30:10,833 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 28 [2025-02-07 20:30:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:30:10,833 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2025-02-07 20:30:10,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 20:30:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2025-02-07 20:30:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:30:10,834 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:30:10,834 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:30:10,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 20:30:11,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:30:11,035 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:30:11,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:30:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1590386141, now seen corresponding path program 1 times [2025-02-07 20:30:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:30:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106405340] [2025-02-07 20:30:11,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:30:11,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:30:11,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:30:11,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:11,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:30:11,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136617702] [2025-02-07 20:30:11,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:30:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:30:11,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:30:11,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:30:11,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:30:11,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:30:11,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:11,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:30:11,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:30:11,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:30:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:30:11,238 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:30:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:30:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106405340] [2025-02-07 20:30:11,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:30:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136617702] [2025-02-07 20:30:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136617702] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:30:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:30:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-07 20:30:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634670135] [2025-02-07 20:30:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:30:11,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:30:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:30:11,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:30:11,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:30:11,240 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 20:30:15,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:30:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:30:15,524 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2025-02-07 20:30:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:30:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-02-07 20:30:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:30:15,526 INFO L225 Difference]: With dead ends: 136 [2025-02-07 20:30:15,526 INFO L226 Difference]: Without dead ends: 134 [2025-02-07 20:30:15,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:30:15,527 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:30:15,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 217 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2025-02-07 20:30:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2025-02-07 20:30:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2025-02-07 20:30:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2025-02-07 20:30:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2025-02-07 20:30:15,543 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 40 [2025-02-07 20:30:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:30:15,543 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2025-02-07 20:30:15,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 20:30:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2025-02-07 20:30:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 20:30:15,544 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:30:15,545 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:30:15,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 20:30:15,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:30:15,749 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:30:15,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:30:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 681689065, now seen corresponding path program 1 times [2025-02-07 20:30:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:30:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524850729] [2025-02-07 20:30:15,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:30:15,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:30:15,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:30:15,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:15,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:30:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177825042] [2025-02-07 20:30:15,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:15,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:30:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:30:15,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:30:15,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:30:15,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-07 20:30:15,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 20:30:15,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:15,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:30:15,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:30:15,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:30:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-02-07 20:30:15,886 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:30:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:30:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524850729] [2025-02-07 20:30:15,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:30:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177825042] [2025-02-07 20:30:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177825042] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:30:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:30:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:30:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286191650] [2025-02-07 20:30:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:30:15,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:30:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:30:15,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:30:15,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:30:15,887 INFO L87 Difference]: Start difference. First operand 134 states and 185 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 20:30:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:30:15,975 INFO L93 Difference]: Finished difference Result 156 states and 215 transitions. [2025-02-07 20:30:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:30:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2025-02-07 20:30:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:30:15,977 INFO L225 Difference]: With dead ends: 156 [2025-02-07 20:30:15,977 INFO L226 Difference]: Without dead ends: 138 [2025-02-07 20:30:15,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:30:15,978 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:30:15,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 114 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:30:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-07 20:30:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2025-02-07 20:30:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 54 states have call successors, (54), 13 states have call predecessors, (54), 13 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2025-02-07 20:30:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 187 transitions. [2025-02-07 20:30:15,991 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 187 transitions. Word has length 55 [2025-02-07 20:30:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:30:15,991 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 187 transitions. [2025-02-07 20:30:15,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 20:30:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 187 transitions. [2025-02-07 20:30:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 20:30:15,993 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:30:15,993 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:30:15,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:30:16,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-07 20:30:16,197 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:30:16,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:30:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1154398308, now seen corresponding path program 1 times [2025-02-07 20:30:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:30:16,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831908620] [2025-02-07 20:30:16,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:16,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:30:16,205 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-07 20:30:16,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:30:16,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:16,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:30:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:30:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:30:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831908620] [2025-02-07 20:30:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831908620] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:30:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945554174] [2025-02-07 20:30:16,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:30:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:30:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:30:16,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:30:16,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 20:30:16,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-07 20:30:17,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:30:17,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:30:17,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:30:17,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-07 20:30:17,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:30:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-07 20:30:18,787 INFO L312 TraceCheckSpWp]: Computing backward predicates...